Bochum 2009 – scientific programme
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HK: Fachverband Hadronen und Kerne
HK 67: Poster Session
HK 67.19: Poster
Thursday, March 19, 2009, 14:00–16:00, Audi-Max
Study of the Measurement of Quarkonia in Different ALICE Central Barrel Detector Configurations — •Anna Bernhard — Institut für Kernphysik, Goethe-Universität Frankfurt, Germany
The measurement of quarkonia is a very promising observable for the study of the quark gluon plasma. The central barrel detectors of ALICE (ITS, TPC, TRD) will reconstruct heavy qq pairs, both in heavy ion collisions and in p+p collisions as reference, via their decay into an electron-positron pair.
The TRD subdetector provides excellent electron identification. However, in the first periods of data taking at the LHC the TRD will not yet be completely installed. The expected performance for the measurement of quarkonia in √s=14 TeV minimum bias p+p collisions via their decay into e+e− has been studied. Fast simulations have been performed, using the event generator PYTHIA and a parameterization of the detector response. We present the results for different scenarios: A fully installed TRD and various incomplete setups including the projected TRD configuration for the first run. Invariant mass spectra are shown for different pT regions as well as the main sources for combinatorical and physical background. Expected yields for one year of data taking are given.